G929 is used for air breathing lines and is designed to resist permeation of noxious gasses into the hose.
The method of manufacture and compounds used ensure a solvent and silicone free hose with low odour.
This hose has been tested and satisfies the "off-gassing tests" as described in U.S. Military specifications MIL-H-2815F Sections 3.12.2 and 4.5.10. G929 also has been tested in accordance with U.S. Mine Safety and Health Administration Regulations and has passed the gasoline permeation tests as described in 30CFR Part 11 Subpart J, 11.124-7.
When suitably coupled with fittings, this hose satisfies the requirements for hose used on Type C Supplied-Air Respirators.
A Type C respirator is for entry into and escape from atmospheres not immediately dangerous to life or health.
It consists of a source of breathing air, a hose, a detachable coupling, a control valve, orifice, demand valve or pressure demand valve, and an arrangement for attaching the hose to the wearer and a face-piece, hood, or helmet.
Note that NIOSH only certifies complete breathing respirator systems, not hose assemblies along.
Please note, when coupled with quick disconnect fittings, the use of a sleeve-lock coupler is required to minimize the risk of accidental disconnection.